need to know about this law, because critics say it damages our ability to truly know, using serious science, the impact that guns have on public health and public safety, impeding research on gun safety, and preventing doctors from talking to patients about the potential health risks that come with gun ownership. add advocates who support the law say it protects the rights of gun owners. the national rifle association somehow managed to put this stealth legislation into president obama's health care reform bill. the question is how and why. and why, whatever you think of a law, one of the president's top allies, that's right, the president's ally, helped the nra get it passed. no surprise that there's a big dose of politics involved here. jim acosta tonight is keeping 'em honest. >> when president obama signed national health care reform into law, few in washington knew that buried in the legislation's more than 900 pages was a gift to the nation's powerful gun lobby. but here it is. a provision entitled "protection of second amendment rights." it states the government and health insurers c